Gas and Oil Home Heating Furnaces - thermocouple?

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09-27-01, 02:04 PM
How long should a thermocouple last? Furnice is ran on propane.

lynn comstock
09-27-01, 03:23 PM
The flame should envelope about 1/2 of an inch of the tip of the thermocouple. The tip should be red hot. The pilot flame should be about 3/4 blue with a yellow tip (ON PROPANE ONLY).

So why do you ask?
09-27-01, 03:41 PM
The thermocouple in my furnice was replaced last year in the begining of winter. Now it seems to have gone out again.
the furnice is only 2 years old and the warrenty ran out.

lynn comstock
10-29-01, 04:56 AM
If and when the thermocouple is replaced, Check the way that the flame hits the termocouple (See the previous Email). If the flame hits it too low, the thermocouple life and performance will be poor.
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10-29-01, 10:19 AM
if you turn gas valve off at end of heating season.When heating season arrives next year just relight it.Oh yes,you will also save all that gas that the pilot uses during the summer when heat is not running.PDF